Bump ipython from 5.1.0 to 7.16.3

Bumps [ipython](https://github.com/ipython/ipython) from 5.1.0 to 7.16.3.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@5.1.0...7.16.3)

---
updated-dependencies:
- dependency-name: ipython
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 recommonmark==0.4.0
-ipython==5.1.0
+ipython==7.16.3
 setuptools==29.0.1
 click==6.6
 pytest==3.0.7